Finding the Fourth Proportional to 9,389.56, 12,956.07 and 5,197

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.56 : 12,956.07 = 5,197 : x
2. Step 2: Convert to fraction form
   9,389.56/12,956.07 = 5,197/x
3. Step 3: Cross multiply
   9,389.56x = 12,956.07 × 5,197
4. Step 4: Simplify right side
   9,389.56x = 67,332,695.79
5. Step 5: Solve for x
   x = 67,332,695.79/9,389.56
6. Step 6: Final answer
   x = 7,171.02